Functions

Geometric functions

GLM Core

These operate on vectors as vectors, not component-wise. More...

Functions

template<typename valType >
detail::tvec3< valType > cross (detail::tvec3< valType > const &x, detail::tvec3< valType > const &y)
template<typename genType >
genType::value_type distance (genType const &p0, genType const &p1)
template<typename genType >
genType::value_type dot (genType const &x, genType const &y)
template<typename genType >
genType faceforward (genType const &N, genType const &I, genType const &Nref)
template<typename genType >
genType::value_type length (genType const &x)
template<typename genType >
genType normalize (genType const &x)
template<typename genType >
genType reflect (genType const &I, genType const &N)
template<typename genType >
genType refract (genType const &I, genType const &N, typename genType::value_type const &eta)

Detailed Description

These operate on vectors as vectors, not component-wise.


Function Documentation

detail::tvec3<valType> glm::cross ( detail::tvec3< valType > const &  x,
detail::tvec3< valType > const &  y 
)

Returns the cross product of x and y.

Template Parameters:
valTypeFloating-point scalar types.
See also:
- GLSL cross man page
- GLSL 4.20.8 specification, section 8.5
genType::value_type glm::distance ( genType const &  p0,
genType const &  p1 
)

Returns the distance betwwen p0 and p1, i.e., length(p0 - p1).

Template Parameters:
genTypeFloating-point vector types.
See also:
- GLSL distance man page
- GLSL 4.20.8 specification, section 8.5
genType::value_type glm::dot ( genType const &  x,
genType const &  y 
)

Returns the dot product of x and y, i.e., result = x * y.

Template Parameters:
genTypeFloating-point vector types.
See also:
- GLSL dot man page
- GLSL 4.20.8 specification, section 8.5
genType glm::faceforward ( genType const &  N,
genType const &  I,
genType const &  Nref 
)

If dot(Nref, I) < 0.0, return N, otherwise, return -N.

Template Parameters:
genTypeFloating-point vector types.
See also:
- GLSL faceforward man page
- GLSL 4.20.8 specification, section 8.5
genType::value_type glm::length ( genType const &  x)

Returns the length of x, i.e., sqrt(x * x).

Template Parameters:
genTypeFloating-point vector types.
See also:
- GLSL length man page
- GLSL 4.20.8 specification, section 8.5
genType glm::normalize ( genType const &  x)

Returns a vector in the same direction as x but with length of 1.

See also:
- GLSL normalize man page
- GLSL 4.20.8 specification, section 8.5
genType glm::reflect ( genType const &  I,
genType const &  N 
)

For the incident vector I and surface orientation N, returns the reflection direction : result = I - 2.0 * dot(N, I) * N.

Template Parameters:
genTypeFloating-point vector types.
See also:
- GLSL reflect man page
- GLSL 4.20.8 specification, section 8.5
genType glm::refract ( genType const &  I,
genType const &  N,
typename genType::value_type const &  eta 
)

For the incident vector I and surface normal N, and the ratio of indices of refraction eta, return the refraction vector.

Template Parameters:
genTypeFloating-point vector types.
See also:
- GLSL refract man page
- GLSL 4.20.8 specification, section 8.5